636 



CEMENTS, LIMES, AND PLASTERS. 



TABLE 237. 

 ANALYSES OF TRASS AND RELATED MATERIALS FROM GERMANY. 



1. Trass. Rhenish, Thorpe, Diet. App. Chem., 3d ed., vol. 1, p. 475. 



2 Dutch. Thorpe, p. 475. 



3. Andernach. Thorpe, p. 475. 



4. Plaidt. von Decken, Anal. Zirkel, Lehrbuch der Petrographie, 1894, vol. 3, p. 678. 



5. Zervas, Anal. Zervas, School of Mines Quart., vol. 18, p. 230. 



6. Andernach. Chatoney and Rivol, Anal. Zirkel, p. 678. 



7. Kruft. Mengerschausen, Anal. Zervas, p. 320. 



8. Brohl. Berthier, Anal. Gillmore, Limes, Cements, and Mortars, p. 125. 



9. Andernach. Chatoney and Rivol, Anal. Zirkel, p. 678. 



10. Brohl. Bruhus, Anal. Zirkel, p. 678. 



11. " Kyll, Anal. Zervas, p. 320. 



12. Trachyte tuff. Siebengebirge, Kyll, Anal. Zervas, p. 320. 



13. " " Laacher See. Merrill, Rocks, Rock Weathering and Soils, p. 141. 



14. " " Siebengebirge. Bischof, Anal. Zirkel, p. 675. 



15. " von der Marck, Anal. Zirkel, p. 675. 



16. Leucite tuff. Weibern. Kyll, Anal. Zervas, p. 320. 



TABLE 238. 

 ANALYSES OF SANTORIN ASH, FROM SANTORIN. 



1. Pumiceous portion. Feichtinger, analyst. Thorpe, Diet. App. Chem., vol. 1, p. 476. 



2. Fine ash. 



3. Obsidian particles. 



4. Average sample. School of Mines Quarterly, vol. 18, p. 230. 



